Printing machine



June 11, 1929. J. KRELL 11,117,230v

PRINTING MACHINE .Filed March :51, 1927 /m/cA/Ta/ Parent-ed June'n, 1929.

PATENT OFFICE.

JOSEPH KBELL, QF BEBLIN-PANXOW, GERMANY.

:PRINTING MACHINE.

Application led March 31, 1927, Serial No. 180,029, and tn Germany Hay 12, 1926.

My invention relates to printing, for instance, addressing machines as described in my U. S. Patent No. 1,582,890, and it is an object of my invention to provide means by i which any printing plate which is presented to the printing platen in the normal o eration of the machine, may be skipped, an to this end I provide a switch adapted to be operated by the attendant to break the circuit of the electromagnet controlling the printing platen which is normally closed by a selective switch as often as a plate is presented at the printing station so that when the attendant operates the switch, the plate which is then pref sented, will be skipped.

It will be understood that under these conditions, that is, when the skipping switch is operated for a given plate presented at the station, the control electromagnet is not ex- 3 cited vnotwithstanding the operation of its selective switch and so this plate will be ski ped.

y these means the possibilities of the machine are increased' as compared with the 3 prior machine referred to.

The skipping switch may be of any suitable design and construction but is preferably made as follows: It is operated by a separate pedal or handle, connected with an automatic detent which retains the switch in its break position so that it will not return to make position immediately its handle is released, and with an automatic mechanism which is under the control of thel printing arm to throw i out the detent, and provided with automatic means, for instance, a spring, for returnin it to its make position after it has been free e by the throwing out of its detent.

In the drawings, part of an addressing mal chine is shown to illustrate my invention by way of example.

i 1 is a section of the machine at the printing station and at right angles to the direction in which the printing plates are presented to the printing platen,

Figs. 2, 3, and 4 illustrate, on a larger scale, details of the skipping switch,

Fig. 2 is an elevation of the switch viewed as in Fig. 1, or in the direction of the arrow II in Fig. 3, showing its make position,

Fig. 3 is a section on the line III-III in Fig. 2,

Fig. 4 shows the upper part of the switch in its break position.

Referring now to Fig. 1, 1 is the table of the machine, 2 is its printing -arm, 3 the shaft on which the arm is reciprocated by means of a rod 30, connected to disk 31, the latter being driven by suitable clutch mechanism`on the main drive 4shaft 32. 4 is the prlnting station, ,5 isa selective switch of nown type which is operatedby projections on vthe lower faces of the printing plates, 6 is an electromagnet, 11 is part of the circuit connecting it with the selective switch 5, 7 is the armature of the electromagnet 6', z is a lever on the shaft 3 which is moved withthe printing arm by friction and is arrested when the armature 7 is attracted, 9 is a head at the end of the printing arm, and 8 is the printing platen which is slidably carried in the head and connected with the lever a by a system of links and levers so as to be pushed into operative position out of the head 9 whenl the lever a has been so arrested. 2 is an eX- tension of the printing arm 2 below the shaft 3 which moves on after the lever a has been arrested so that the motion of the printing arm is not interfered with by the lever a, the extension 2 moving on in the direction against the arrow 9', and the printing platen 8 is forced against the paper on the printingl late which is at the printing station 4, hen the printing arm 2 returns to its initial position, the electromagnet 6 is de-4 energized and drops its armature 7 which then releases the arm a and the arm z is free to move with the extension 2 until the extension strikes an abutment 10 on the frame of the machine. The lever z is now in its initial position as shown in Fi 1, the printing platen 8 is returned into its lnitial position, and the machine is ready for another operation.

12 are contacts at which the circuit 11 is broken, 13 are contact sprin s on a switch body 15, which springs are a apted to make contact at 12, 12, the body being of insulating material, 14 is a plunger to which the body is secured, 16 is a sleeve on the frame of the machine in which the plunger l14 is slidably carried, 17 is a spring in the sleeve whic tends to hold the plunger in its upper lend yposition in which the contact springs and fixed contacts complete the circuit 11, 18 lis a Bowden cable secured to the plunger 14, 19 is a pedal to which the other end of the cable is secured, 20 is its fulcrum, and 21 is a tubular standard on which the fulcrum is carried. Preferably the tube 21 also supports the pedalnot shown--for-throwing inthe ma; chine.

22 is a shoulder machined in the plunger i 111, 23 is a preferably U-shaped, detent adaptedto cooperate with the shoulder 22, 24 is its fulcrum on the sleeve 16, 25 is a downward extension of the detent, 26 is a spring tending to hold the detent 23 engaged with the shoulder 22 as indicated by the arrow 27, and 28 is a push bar pivoted to the extension 2 of the printing arm 2 and adapted to throw out the detent 23.

As long as the pedal 19 is not operated the Circuit 11 is closed at the contacts 12, 12 by the springs 13 and the machine operates as the machine described in my prior patent. W'hen, however, the attendant desires not to print any of the plates which are presented at the printing station in due course, she will depress the pedal 19, moving the switch 15 down into the break position, Fig. 4, and allowing the detent 23 to engage the shoulder 22 under the action of its spring 26. The downward mot-ion of the plunger 14 under the action of the Bowden cable 18 and against the spring 17, consequently, causes the contacts 12` to be opened and the circuit 11 tol be broken, deenergi/zing the electromagnet- 6 and preventing printing of the plate which is to be skipped.

The skipping switch will remain in its position after the pedal has been released while the detent 23 remains in position on the shoulder 22. When the skipped plate has been moved past the printing station and the next plate has been presented, and 'this plate is to be printed as usually, the pedal 19 is not operated and the push bar 28 will throw out the detent 23 when the printing arm has returned to its initial position, allowing the spring 17 y,to movethe "switch 115. intowits 4 make position as shown-in Fig/2.

To lfacilitate identification of the printing plates which shouldbe skipped, the plates are preferably provided'with marks of any kind, 'for instancepcoloured strips so that the attendant is able at a glance to pick out the plates which must be skipped.

I claim:

1. A. printing machine comprising a frame,

a continuously oscillating printing arm fula continuously oscillating printing arm fulv orumed on said frame, means for rocking said arm, an impression platen on said arm, mechanism for actuating said impression platen and operatively connected withV said means, an electromagnetic control for said mecha` nism, a circuit connected `with said electromagnetic control, a switch adapted to break said circuit, an automatic detent for locking said switch in its break position, automatic means for returning it into its make position, and means operatively connected with said printing arm for throwing out said detent.

In testimony whereof I aix my signature.

JOSEPH KRELL. 

